"sunbird" resorts

Just as Arizona and Florida offer long-term RV sites for snowbirds, do northern states offer the same for those wanting to get away from the heat and humidity of summer? I'm trying to find a resort park for the over-55 crowd that has all the wonderful activities (fitness center, dance lessons, golfing, arts and crafts, etc.). Any suggestions?
"sunbird" resorts

Get away from heat and hmidity? Play golf? Enjoy complete fitness/recreation center five minutes away? Be active but comfortable? Sounds like Tiger Run RV resort in Breckenridege Colorado where long term stays are common in summer and ski season.